From 014f61504af276ba9d9544d8a7401d8f8526eb73 Mon Sep 17 00:00:00 2001
From: Ping Cheng <pingc@wacom.com>
Date: Tue, 13 Apr 2010 23:07:52 -0700
Subject: [PATCH] Input: wacom - switch mode upon system resume
When Wacom devices wake up from a sleep, the switch mode command
(wacom_query_tablet_data) is needed before wacom_open is called.
wacom_query_tablet_data should not be executed inside wacom_open
since wacom_open is called more than once during probe.
wacom_retrieve_hid_descriptor is removed from wacom_resume due
to the fact that the required descriptors are stored properly
upon system resume.
Reported-and-tested-by: Anton Anikin <Anton@Anikin.name>
Signed-off-by: Ping Cheng <pingc@wacom.com>
Cc: stable@kernel.org
Signed-off-by: Dmitry Torokhov <dtor@mail.ru>
---
drivers/input/tablet/wacom_sys.c | 12 +++++++-----
1 file changed, 7 insertions(+), 5 deletions(-)
diff --git a/drivers/input/tablet/wacom_sys.c b/drivers/input/tablet/wacom_sys.c
index 8b5d2873f0c4..f46502589e4e 100644
--- a/drivers/input/tablet/wacom_sys.c
+++ b/drivers/input/tablet/wacom_sys.c
@@ -673,13 +673,15 @@ static int wacom_resume(struct usb_interface *intf)
int rv;
mutex_lock(&wacom->lock);
- if (wacom->open) {
+
+ /* switch to wacom mode first */
+ wacom_query_tablet_data(intf, features);
+
+ if (wacom->open)
rv = usb_submit_urb(wacom->irq, GFP_NOIO);
- /* switch to wacom mode if needed */
- if (!wacom_retrieve_hid_descriptor(intf, features))
- wacom_query_tablet_data(intf, features);
- } else
+ else
rv = 0;
+
mutex_unlock(&wacom->lock);
return rv;
--
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